This is a continuation of previous discussion here:
NFSv3 vs NFSv4 vs iSCSI for ESXI datastores
OK, so there is good news and bad news about connectx-3 and iser on esxi.
First the bad news.
The bad news is, there are issues with flow control which might or might not be able to be resolved...
Was comparing CX3 with CX3 pro cards and found out that CX3 cards will work in x4 mode when connected to pcie3 (x8 in gen2), but nothing about this in XC3-Pro En but these lines:
A lesser width adapter can be seated into a greater width slot (x4 in a x8), but a greater width...